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Title:
SURFACE LIGHT SOURCE DEVICE, LIGHT GUIDE ELEMENT USED FOR SURFACE LIGHT SOURCE DEVICE, AND METHOD FOR PRODUCING LIGHT GUIDE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2011/115124
Kind Code:
A1
Abstract:
Disclosed is a plate-like light guide element (24) provided with a light incident surface, a light exit surface (242), and an underside surface (243) disposed on the opposite side of the light exit surface (242). A foamed surface layer (244) is formed on at least a part of at least either the light exit surface (242) or the underside surface (243). The foamed surface layer (244) contains air bubbles and has a recessed sectional surface including the normal direction of the light exit surface (242) or the underside surface (243). The light guide element (24) is produced by performing infrared laser etching for at least a part of at least one of the main surfaces of a plate-like light guide element material composed of a acryl resin plate produced by a continuous plate production method, to form the foamed surface layer (244).

Inventors:
YAGI Kenji (Mitsubishi Rayon Co. Ltd. 10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
八木 健二 (〒53 神奈川県横浜市鶴見区大黒町10番1号 三菱レイヨン株式会社横浜先端技術研究所内 Kanagawa, 〒2300053, JP)
SHIMIZU Minoru (Mitsubishi Rayon Co. Ltd. 10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
清水 稔 (〒53 神奈川県横浜市鶴見区大黒町10番1号 三菱レイヨン株式会社横浜先端技術研究所内 Kanagawa, 〒2300053, JP)
WAKUI Yasuo (Mitsubishi Rayon Co. Ltd. 10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
Application Number:
JP2011/056084
Publication Date:
September 22, 2011
Filing Date:
March 15, 2011
Export Citation:
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Assignee:
MITSUBISHI RAYON CO., LTD. (6-41, Konan 1-chome Minato-k, Tokyo 06, 〒1088506, JP)
三菱レイヨン株式会社 (〒06 東京都港区港南一丁目6番41号 Tokyo, 〒1088506, JP)
YAGI Kenji (Mitsubishi Rayon Co. Ltd. 10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
八木 健二 (〒53 神奈川県横浜市鶴見区大黒町10番1号 三菱レイヨン株式会社横浜先端技術研究所内 Kanagawa, 〒2300053, JP)
SHIMIZU Minoru (Mitsubishi Rayon Co. Ltd. 10-1, Daikoku-cho, Tsurumi-ku, Yokohama-sh, Kanagawa 53, 〒2300053, JP)
清水 稔 (〒53 神奈川県横浜市鶴見区大黒町10番1号 三菱レイヨン株式会社横浜先端技術研究所内 Kanagawa, 〒2300053, JP)
International Classes:
F21S2/00; G02B6/00; G02F1/13357; F21Y101/02
Attorney, Agent or Firm:
NAGAI Michio (LOGOS Patent Attorneys Office, Landic Toranomon Bldg. 7-10, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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Claims: